Collapsible core



3 Sheets-Sheet Filed Oct. 22, 1923 WE. D/ Vl B A TTORIVEYS Nov. 19, 1929. B. DE MATTIA COLLAPSIBLE CORE s sheets-smet 2 Filed Oct. 22, 1923 WITH/8858 B. DE MATTIA COLLAPSIBLE CORE No@ 19, 1929. v1,735,955

Filed Oct. 22, 1923V 5 Sheets-Sheet 3 WIM/8858 A TTOH/VEYS Patented Nov. 19, 11929 BAET-IOLD DE MATTIA, F GARFIELD, NEX-TJ JERSEY, ASSIGNOR, BY MESNE .ASSIGN- MENTS, TO NATIONAL RUBBER MACHINERY COMPANY, OF-AKRON, OHIO, A COIR- PORATION 'OF OHIO COLLAESIBLE CORE Application led October 22, 1923. Serial No. 670,186.

The present invention relates to collapsible cores used in the manufacture of shoes or cas- -ings for pneumatic tires, and has for its obplane as the result of rotating a part of the apparatus about an axis perpendicular to said plane, as, fork instance, by rotating the entire core or a hand-wheel or the like mounted on the liXed central support to which, as is usual in the art, the various movable sections are connected.l

fin important object of the invention, also, is to provide a collapsible core for the purpose spccilied, wherein certain sections, herein# after called the lrey sections and arranged in diate means may be employed between said central rotatable structure and the fractionally rotatable actuator, and, moreover, inter.-

mediate means very compact in al direction transverse to said plane.

A further important object of the inveni tion is to provide a collapsible core' as just characterized, wherein only four sections may constitute'the entire core, with such sections arranged in pairs and so dissimilarly movable that onlyvone pair need be operatively connected to said rotatableactuator or equivalent; thus permitting saidpair of sections, constituting the key sections, to be lirst moved simultaneously as the result of suitable operating means provided therefor, after which the secondary sections are freed from `the completed tire solely as the result of grasping the tire and pulling or thrusting thesarne out of the planeof operative continuity.

Another object of this invention is a core wherein certain of the sections are withdrawn from the 'position of operative continuity but nevertheless remain in the plane of operative continuity while certain other sections are capable of being moved from the position of operative continuity into a position in a plane angularly disposed to the plane of operative continuity'.

The invention will be more clearly understood, and various objects and advantages thereof additional to those above mentioned will be fully appreciated, from the following description when taken in connection with vthe accompanying drawings showing embodiments of the invention as at present preferred.

In said drawings, in which the plane of operative continuity of the core is assumed to be vertical,

Fig. 1 shows the core in vertical axial section, being a view taken on the line 1 1 of Fig. 2;

Fig. 2 is a sectional view taken on line 2 2 of Fig. 1 but. virtually showing the entire apparat-us in front elevation;

r Fig. 3 is a section taken on line 3 3 of F 1, but virtually showing the entire apparatus in rear elevation;

Fig. l is a fragmentary view, showing certain of the parts of Fig. 3 removed and disclosing more clearly certain of the underly- Ving Vparts Fig. 5 is a section taken on line 5 5 of Fig. 2, showing in broken lines the positions assumed by the secondary sect-ions and certain other parts when the core is collapsed;

Fig 6 is a section taken on line 6 6 of Fig. 2, showing in full lines the positions assumed by the key sections and certain other parts when the core is collapsed;

Fig. 7 is a fragmentary view, partially in side elevation and partially in section, showing a modilication, but lwith certain of the parts disclosed being identicalwith similarly numberedv parts in Fig. l; and

Fig. 8 is a vertical section taken on liney lar parts throughout the several views of the drawings.

Referring first to the modilication of Figs. 1 to G, the core proper comprises a pair of key sections 9, and a pair of secondary sections the key sections being arranged in alternation with the secondarv sections.

irey sections 9 aie movable toward and .away from each other in the plane of operative continuity, being secured rigidly to the -outer ends of slides 12. These slides work in guide-ways formed between a pair of castings 13 and 1st, bolted together at 15', and forming a central core-supporting structure.

Each secondary section 10 is secured rigidly to the outer end of Va swing-arm 15, as at 16. The other end of each swing-arm is pivoted to central casting 13 as at 17.

The central structure made up of castings 13 and lll is secured rigidly to a substantially horizontal jack-arm or the like forming a part of any appro-ved foundation structure for the core, by means of the following provisions: As shown best in Figs. 1 and 2, casting 14 carries a centrally offset sleeve 18, the internal threads of which take external threads on a reduced extension 19 of the jackarm shown at 20. The rigid mutual securement of the parts 18 and 19 may be further insured by the application of a positive securing means, such as a suitable transverse pin or the like not shown. n

The means for simultaneously giving sliding movements to the two key sections 9, to move them from the full-line positions to the broken-line positions of Fig. 3 or vice versa, includes a hand-wheel having a hub 21, and a linkage intermediate such wheel and the slides 12; such hand-wheel constituting the rotary actuator or rotatable central structure aforesaid, in the case of the present embodiment, and to that end being loose on sleeve'18 of' central fixed casting 111. The hand-Wheel is held by a collar 22, forming a part of jack-arm 20, to rotation in a plane substantially parallel t-o the plane of operative continuity of the core sections. The intermediate linkage just above Amentioned comprises a pair of instrumentalities or mechanical interponents each directly operatively'connecting the hand-wheel and one of the slides 12; each such instrumentality being a curved draw-bar or link 23 also movable in a plane parallel to said plane of operative continuity. As shown best in Fig. 3, each of these links is pivotally connected at its outer end to a slide 12, as at 24C, and at its inner end to one of two radially oppositely offset lugs or ears 25 reduced prolongations of which constitute a pair of spokes 26 lixedly .carrying an outer rim 27 constituting the present case to avoid excessive complexity in the showing of said Fig. 3.

The inner ends of links 23 are pivotally connected to ears by pins or studs marked 28 in Figs. 1 and 3.

Those studs 2S also constitute elements of means for removing materially from ears 25 the work and strain of swinging the links 23 from their full-line to their broken-line positions of Fig. 3, on fractionally rotating the hander/heel to collapse the key sections 9, and said studs have further useful functions; all will now be explained. Comparing Figs. 1 and 4, it will be seen that each stud 28, after being extended through its ear 25 and its engaged link 23, has'a protruding terminal portion 29; and the outer face of central casting 14 is provided with two interrupted arcuate grooves marked 30 in Fig. it. The terminal portions 29 of the studs 23 lit these grooves fairly snugly yet so as `to be freely movable lengthwisely of the grooves when the studs are moved through arcuate patls co-extensive with the lengths of the grooves, by a. fractional rotation of the handwheel. Fach groove is interrupted where casting 111 is provided with a cut-away pro-rtion as indicated at 31 in Fig. 4; these cut-r away portions matching' similar cut-away portions in casting 13 between the gibs marked ,32 in Fig. 2. These cut-away portions allow for the redisposition of the parts, and particularly of the curved links 23, as sli-own in broken lines in Fig. 3, on collapsing the key sections 9, that is. on sliding'such sections in toward eachother in the plane of operative continuity. The opposite ends of ea ch curved groove 30 form'delinite, positive .st-ops for the termina-l portions 29 of the studs 28. rFlins, as such portions 29 are shown in 4l, the links 23 are disposed as shown in full lines in Fig. 3, and the core is in operative continuity.

In order to provide positive means for holding the secondary sections 10 in operative continuity with the key sections 9, the following parts are provided: As shown best in Figs. 2V and 6, each swing-arm 15 carries intermediate its ends and on its side edge adjacent the other arm, a ledge-projection 33. These projections on the two arms lie in the same plane when said arms are disposed to maintain the secondary sections in the plane of operative continuity. Such ledges, when thus arranged, are adapted to be engaged by keepersror wedge-projections marked 3ft in Fig. 1 on a for the application of a cap-holdingnut 39. y

` Operation' Assuming atire to havebeen formed on the core, with the sections arranged as shown in Figs. 1 and 2, so that such tire should now be removed' from Vthe apparatus, hand-wheel 27 is rotated in the direction of the arrow 40 of Fig. 1, thus swinging the links '23 in the direction ofthe arrowsshown in' Fig. 3, un-

til such links assume the broken-linepositions there shown and with their concavely curved side edges hugging closely hub 21 of the handwheel, as perhaps best shown in Fig. 6. As the result of this simple, instantaneous opergroove now accommodate the ends of links 23 carrying said pivot studs. Upon next turning cap through 900- as shown'in Fig. 2,

thus to unlock swing-arms 15 which mount the secondary sections for swinging movements away from the plane of operative continuity 'of all the sectioiis,-it will be found that the tire may be easily stripped from the coi'e by pulling the former toward the observer in Fig. 2 the secondary sections swinging part of the way with the tire and sufficiently to permit the same to be gradually stripped from the core without permanent distortion or other damage. l

To restore all the core sections to operative continuity, and positively to lock them in that posit-ion, the secondai'y sections of course are first swung back to their positions in the plane of operative continuity, the hand-wheel is next fi'actionally rotated in a direction opposite to that of the arrow 40 of Fig. 1 and until the parts shown in Fig. 2 all assume their full-line positions, and finally the cap 35 is turned through 90 to return the locking projections on the saine to co-action with the ledges on'theswing-arins 15 as shown in said Fig. 2.

Referring now to the modification of Figs. V7 and 8, which differs from the embodiment above described principally in that the handwheel is dispensed with and instead the central supporting structure formed by the castings 13 and 14 of Fig. 1 is utilized also as the rotatable actuator for moving the key sections in the plane of operative continuity, it is first pointed out that the reference numerals 10, 13, 14, 23, 24, 28 `and 29 indicate precisely the saine elements as in the case of Figs. 1 to 6.v The pivot studs 28, however.,

instead of piercing ears 25 offset from hand- 'g'agement with the notch 45.

wheel hub 21, as in the case of Figs. 1 to 6, pierce, as best shown in Fig. 8, a shaped disk 41 formed at its center as a sleeve'and mounted on a shaft 42 rotatable in jack-arm 43,

hereinafter called the central fixed structure. l v 'This shaft is rigidlyl secured to the central casting 14, so that the central supporting structure formed by the castings 13 and 14, vall the core sections niovably mounted on the latter structure, and the shaft 42 may be rotated as one unit relative to the fixed structure 43; a suitable spacing collar 44 being on the shaft between the disk 41 and said fixed structure.

In order to lock the disk 41 against rotation with shaft 42 (and with all the parts to the left of collar'44 in Fig. Zas just described), thereby to causeinward sliding `movements of the key sections in the plane of operative continuityv always to accompany movements of such sections through circular paths in said'plane, in other words, to permit i rotative force applied to a completed tire itself to result in the collapsing of the key sections by what may be termed movements of such sections through spiral paths in said plane,-the following parts are provided: Disk 41'is shaped to present a forked projection 45 as shown when all the core sections are in operative continuity, so that then the fork is positioned for the reception as illustrated of a locking arm 46 forming part of a lever pivoted at 47 on a mount 43L on fixed structure 43. This lever has also a handlearm 48 and a third arm 49 to abut structure 43 when the lever is manually thrown to clear disk 41.'

In the case of the embodiment just described,the key sections are moved inward and outward by turning the core about its axis at 4a time when the latch 46 lis in enlf the latch be disengaged fromthe notch 45 after the core has been expanded, then the core can be revolved-about its axis without causing' rany radial movement of the key sect-ions.

The operation of the modification of Figs. Zand 8, should be obvious from the foregoing. VIt will be understoodthat with the revolution, and, the locking lever having been left in engagement with disk 41'as shown,

the key sections of the core are collapsed as in the case of the apparatus of Fig. 1, which permits removal of the tire pursuant to the invention. Such tire removed, the core sections are all restored to operative continuity,

f also pursuantto the invention, by first swinging the secondary sectionsfback totthe'plane of operative continuity,andthen by turn- EGO ing the central rotatable structure a fraction of a revolution in the reverse direction. It will be understood that when the locking lever is released from the disc 4l, the entire core structure may be rotated without causing relative movement ot' the key sections as an accompaniment thereof.

I claim:

l. A collapsible core comprising a plurality of core sections, one ot said sections being pivotally mounted to swing in and out of the plane ot operative continuity, the pivotal point of such section being located upon one side of a diametrical line cutting the axis of the core, and the core section being upon the opposite side ot said line.

2. A collapsible core comprising a plurality of core sections, levers carrying a number oi oppositely disposed sections, such levers being pivotally mounted at opposite sides of and crossing each other and at opposite sides of a line cutting the longitudinal axis of the core.

8. The combination with a rotatably mounted collapsible core and a device which is normally rotatable with the core but which is operable to initiate the collapsing movement of the core when the same is rotated relative to the device, of means for locking said device against rotation.

4. In a collapsible core construction a freely rotatable core body comprising a key section, an actuator normally rotatable in unison with the core body but operable responsive to the rotation of the core body relative to the actuator to Withdraw the key section from the core body, and means for locking the actuator against rotat-ion.V

5. In a collapsible core construction a treely rotatable core body comprising a plurality of key sections, an actuator normally rotatable in unison with the corebody but operable responsive to the rotation of the core body independently of the actuator to Withdraw the key sections :trom the core body, and means for locking the actuator against rotation.

6. In a collapsible core construction a. core body comprising a plurality of sections; a spindle Wliereon said core body is normally t'reely rotatable; a collar adapted to rotate in unison With the core body or to be locked against movement relative to the spindle, and

body comprising a movable key section, a

spindle Whereon said core body is normally fre-ely rotatable, and means responsive to the rotation of said core body about said spindle for causing said key section to be Withdrawn therefrom.

8. In a collapsible core construction a core body comprising a movable key section, said core body adapted to be rotatably mounted When used in accordance With its normal mode of operation, meansl for withdrawing the key section from the core body, and. means operable responsive to the rot-ation odo the core body kfor actuating said key section withdrawing means.

9. In aA collapsible core construction a core body comprising a movable key section, saidm. core body adapted to be rotatably mounted "w when used in accordance with its normal mode of operation, means to guide the key section in its movement to and from its position in the core body, and means operable responsive to thek rotation of said core-body tor causing said key section to be Withdrawn therefrom. j

l0. In a collapsible core construction a core body comprising a movable key section, saidcore body adapted to be rotatably mounted when used in accordance With its normal mode of operation, means to guide the key section in its movement to and fromits position in the core body, a link operable to moveV the key section to and from its position in ythe key section, and means controlled by the rotation ot the core body to operate said link.

BARTHOLD DE MATTIA.

EGO 

